Oral exam Flashcards
What components operate off of the propeller reduction gear box?
HAP-P Hydraulic pump (main engine-driven pump) AC generator Propeller control unit (PCU) Propeller over speed governor (POG)
What components operate off of the engine accessory gear box?
FOD-P FMU/Fuel pump Oil pump DC Starter generator PMA: Permanent Magnet Alternator
What is the function of the power uptrim?
Automatically augments the power of the remaining engine in response to loss of other engine
What action would you take for an ENG FADEC FAIL warning light?
Reference appropriate emergency checklist which will direct me to shut down the engine
Does the auto feather need to be armed for uptrim to occur?
No. An uptrim on the operating engine is initiated regardless of auto feather selection.
A power uptrim will occur when either of the following two conditions exist:
- The torque of the failed engine falls below 25% with the power levers in the RATING detent and MTOP not selected
- When power turbine speed (NPT) falls below 80% with the power levers in the RATING
detent and MTOP not selected
What are the engine start abort memory items?
__Condition lever: fuel off
Start SELECT switch: Center
When does the DC starter-generator convert from a starter to a generator?
50% NH
The start-select switch centers
What drives the engine accessory gearbox?
High pressure (NH) compressor rotor
What indicates the prop is feathered?
Propeller RPM <300
What does the FADEC do?
Controls engine fuel scheduling. Also, Controls engine bleed valves NH over speed protection Controls automatic start sequence Supplies voltage to PEC Monitors and detects faults
When does the FADEC switch from essential bus to PMA?
20% NH
What is the primary source of power for the FADEC?
PMA– Permanent magnet alternator
When is using RDC NP prohibited?
Reduced NP landings are prohibited when:
- Landings are accomplished at the Solid Bug VREF (ICE)
- Performance requires Bleeds OFF.
- Tailwind component exceeds ten knots.
- Windshear is reported or suspected.
- Runway is contaminated or braking action is less than good.
- Landing performance is derived from the Emergency and Abnormal Checklist manual section 15, Adjusted Landing Speed and Distance Tables.
What is the maximum battery load meter reading for takeoff?
Standby battery, auxiliary battery, and main battery maximum load meter reading for takeoff is 0.1
What is the minimum battery temperature for takeoff?
-20 degrees C
After starter reset, when can you commence the start procedure for the other engine?
SELECT light extinguishes, and
A MAIN BATT load of 40 or less is indicated on the ELECTRICAL system page
Under what conditions may the APU be used for engine starts even though a GPU is available?
- The APU is already operating (for bleed air, etc.)
- Engine starts at the gate are prohibited (eg airport restrictions)
- Engine start at the gate will delay or be delayed by passenger boarding of an adjacent aircraft
What is the definition of blocking out for maintenance purposes?
Movement of the aircraft under its own power for the purpose of flight.
What are the primary power source caution lights when there are multiple amber caution lights illuminated?
#1/#2 ENG HYD PUMP #1/#2 DC GEN #1/#2 AC GEN
Why do we need to know what the primary power caution lights are?
These are the cause of multiple other caution indications
Can we reset/pull circuit breakers without direction from an emergency/abnormal checklist or maintenance control?
No, in accordance with the circuit breaker trip checklist, unless the affected system is required to safely complete the flight
Approximately how long should the batteries last when on essential power?
30 minutes
List a combination of failures that would cause the EPCU (Electrical Power Control Unit) to enter emergency mode.
Dual DC Starter-Generator failure
Single TRU Failure
What systems are powered by the 115V AC busses?
Aux Fuel Pumps (#1 and #2)
TRU (Transformer Rectifier Unit)
Icing (De-icing/anti icing heaters)
Standby Hydraulic Pump (#1 Hydraulic System)